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Fix spot termination for IMDSv2 #24

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Merged
mnecchi merged 1 commit into from
Feb 11, 2026
Merged

Fix spot termination for IMDSv2 #24

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23 changes: 18 additions & 5 deletions config/plugin/spot_termination.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -4,13 +4,26 @@ OK=0
NONOK=1
UNKNOWN=2

status_code=`curl --max-time 3 --silent --output /dev/stderr --write-out "%{http_code}" "http://169.254.169.254/latest/meta-data/spot/instance-action"`
# Try to get IMDSv2 token (for AL2023)
TOKEN=$(curl -X PUT "http://169.254.169.254/latest/api/token" \
-H "X-aws-ec2-metadata-token-ttl-seconds: 21600" \
--max-time 3 --silent --fail 2>/dev/null)

if [ "${status_code}" -eq "404" ]
then
# Check spot termination notice
if [ -n "$TOKEN" ]; then
# Use IMDSv2 if token was obtained (AL2023)
status_code=$(curl --max-time 3 --silent --output /dev/stderr --write-out "%{http_code}" \
-H "X-aws-ec2-metadata-token: $TOKEN" \
"http://169.254.169.254/latest/meta-data/spot/instance-action")
else
# Fall back to IMDSv1 (Linux 2)
status_code=$(curl --max-time 3 --silent --output /dev/stderr --write-out "%{http_code}" \
"http://169.254.169.254/latest/meta-data/spot/instance-action")
fi

if [ "${status_code}" -eq "404" ]; then
exit $OK
elif [ "${status_code}" -eq "200" ]
then
elif [ "${status_code}" -eq "200" ]; then
exit $NONOK
else
exit $UNKNOWN
Expand Down